Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New Technique Controls Graphite to Graphene Transition

03.07.2012
Technique offers way to study how electron acquires mass

University of Arkansas physicists have found a way to systematically study and control the transition of graphite, the “lead” found in pencils, to graphene, one of the strongest, lightest and most conductive materials known, an important step in the process of learning to use this material in modern day technology.


The top three images of graphite are from the experiment and the lower three images were produced through theoretical calculations. The images from left to right show more displacement of the top layer of graphite and its transition to graphene.

Peng Xu, Paul Thibado, Yurong Yang, Laurent Bellaiche and their colleagues report their findings in the journal Carbon.

Physicists at the University of Manchester first isolated graphene, a one atom thick sheet of carbon atoms, by using Scotch tape to lift only the top layer off of the other layers of graphite. Electrons moving through graphite have mass and encounter resistance, but electrons moving through graphene are massless and encounter almost no resistance, which makes graphene an excellent candidate material for future energy needs and for quantum computing for enormous calculations while using little energy.

However, graphene is a new material only discovered in 2004, and many things remain unknown about its properties.

“The transition from graphite to graphene can be random,” said Xu. “Our idea was to control this.”

The researchers used a new technique called electrostatic manipulation scanning tunneling microscopy to “lift” the top layer of graphite, creating graphene. Scientists have traditionally used scanning tunneling microscopy on a stationary surface, but this new technique uses a moving surface to move between graphite and grapheme.

“Not only can we make it happen, but we can control the process,” Xu said.

Using this technique, the researchers can tell how much force it takes to create graphene and how much distance exists between graphene and the graphite as well as to track the total energy of the process.

How the electron acquires its mass is a fundamental topic and is related to particle physicists’ hunt for the Higgs boson, a long-hypothesized elementary particle that has predicted properties, such as a lack of spin and electric charge, but that does not have a predicted value for mass. Being able to move electrons between a massive and massless state allows scientists to study this duality and how it works. The level of control the scientists have over the process will allow them to figure out possible ways to use graphene for advancing this understanding.

Xu and his colleagues are researchers in the J. William Fulbright College of Arts and Sciences.

CONTACTS:
Peng Xu, physics
J. William Fulbright College of Arts and Sciences
479-575-6178, pxu@uark.edu
Melissa Lutz Blouin, senior director of academic communications
University Relations
479-575-55, blouin@uark.edu

Melissa Lutz Blouin | Newswise Science News
Further information:
http://www.uark.edu

More articles from Materials Sciences:

nachricht Game-changing finding pushes 3D-printing to the molecular limit
20.06.2018 | University of Nottingham

nachricht Creating a new composite fuel for new-generation fast reactors
20.06.2018 | Lobachevsky University

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Temperature-controlled fiber-optic light source with liquid core

In a recent publication in the renowned journal Optica, scientists of Leibniz-Institute of Photonic Technology (Leibniz IPHT) in Jena showed that they can accurately control the optical properties of liquid-core fiber lasers and therefore their spectral band width by temperature and pressure tuning.

Already last year, the researchers provided experimental proof of a new dynamic of hybrid solitons– temporally and spectrally stationary light waves resulting...

Im Focus: Overdosing on Calcium

Nano crystals impact stem cell fate during bone formation

Scientists from the University of Freiburg and the University of Basel identified a master regulator for bone regeneration. Prasad Shastri, Professor of...

Im Focus: AchemAsia 2019 will take place in Shanghai

Moving into its fourth decade, AchemAsia is setting out for new horizons: The International Expo and Innovation Forum for Sustainable Chemical Production will take place from 21-23 May 2019 in Shanghai, China. With an updated event profile, the eleventh edition focusses on topics that are especially relevant for the Chinese process industry, putting a strong emphasis on sustainability and innovation.

Founded in 1989 as a spin-off of ACHEMA to cater to the needs of China’s then developing industry, AchemAsia has since grown into a platform where the latest...

Im Focus: First real-time test of Li-Fi utilization for the industrial Internet of Things

The BMBF-funded OWICELLS project was successfully completed with a final presentation at the BMW plant in Munich. The presentation demonstrated a Li-Fi communication with a mobile robot, while the robot carried out usual production processes (welding, moving and testing parts) in a 5x5m² production cell. The robust, optical wireless transmission is based on spatial diversity; in other words, data is sent and received simultaneously by several LEDs and several photodiodes. The system can transmit data at more than 100 Mbit/s and five milliseconds latency.

Modern production technologies in the automobile industry must become more flexible in order to fulfil individual customer requirements.

Im Focus: Sharp images with flexible fibers

An international team of scientists has discovered a new way to transfer image information through multimodal fibers with almost no distortion - even if the fiber is bent. The results of the study, to which scientist from the Leibniz-Institute of Photonic Technology Jena (Leibniz IPHT) contributed, were published on 6thJune in the highly-cited journal Physical Review Letters.

Endoscopes allow doctors to see into a patient’s body like through a keyhole. Typically, the images are transmitted via a bundle of several hundreds of optical...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Munich conference on asteroid detection, tracking and defense

13.06.2018 | Event News

2nd International Baltic Earth Conference in Denmark: “The Baltic Sea region in Transition”

08.06.2018 | Event News

ISEKI_Food 2018: Conference with Holistic View of Food Production

05.06.2018 | Event News

 
Latest News

Better model of water under extreme conditions could aid understanding of Earth's mantle

21.06.2018 | Earth Sciences

What are the effects of coral reef marine protected areas?

21.06.2018 | Life Sciences

The Janus head of the South Asian monsoon

21.06.2018 | Earth Sciences

VideoLinks
Science & Research
Overview of more VideoLinks >>>